What is the basic purpose of having leap years?

A) to keep the equinoxes and solstices occurring around the same calendar dates each year
B) to keep lunar calendars roughly synchronized with solar calendars
C) to make sure that the average length of a solar day remains about 24 hours
D) to ensure that there are always 12 months in a year


A) to keep the equinoxes and solstices occurring around the same calendar dates each year

Physics & Space Science

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